For A Worry-Free Night Sleep, This 3M Waterproof Mattress Pad Has You Covered. Sleep Philosophy Introduces The Harmony 3M Waterproof Mattress Pad With The Newest Technology On The Market. Made From 100% Polyester, This Pad Is Waterproof And Has Moisture Management Fabric To Help Wick Away Moisture And Resist Against Stains. For Those Who Are Worried About Allergies, This Mattress Pad Is Filled With Anti-Microbial Hypo-Allergenic Polyester Filling And Has A Dust Mite Barrier To Resist Against Bed Bugs And Allergens. Fits Mattresses Up To 18" In Height.